[コアラのマーチ] Koara no Machi (chocolate biscuits): Association with koalas,
which never fall (ochiru, which means both “fall” and “fail [an
exam]”) from trees, even when they’re asleep.

In one part of Japan, pears (nashi 梨) that had survived a big typhoon
without falling off the trees were distributed to students taking entrance
exams as tokens that they “won’t fall short/fail” (ochiru koto nashi 落ちることなし;
“nashi” meaning “not”) of the passing mark to the school they want to attend.

Prior to entrance exams, some students avoid playing or even mentioning
sports that involve sliding (suberu), such as skiing and skating,
because “suberu” can also mean to fail entrance exams.